187643968 has 28 divisors (see below), whose sum is σ = 375091452. Its totient is φ = 93132800.

The previous prime is 187643947. The next prime is 187643969. The reversal of 187643968 is 869346781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73410624 + 114233344 = 8568^2 + 10688^2 .

It is not an unprimeable number, because it can be changed into a prime (187643969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933 + ... + 19468.

Almost surely, 2^187643968 is an apocalyptic number.

It is an amenable number.

187643968 is a deficient number, since it is larger than the sum of its proper divisors (187447484).

187643968 is a wasteful number, since it uses less digits than its factorization.

187643968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21550 (or 21540 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 187643968 is about 13698.3198969801. The cubic root of 187643968 is about 572.5035746616.

The spelling of 187643968 in words is "one hundred eighty-seven million, six hundred forty-three thousand, nine hundred sixty-eight".